Looking for part #'s for my tranny fluid. NV 4500. I understand Syntorqe is it. GM has something that is less $ ? In searching I found part #'s at http://www.dodgeram.org/tech/transmi...v4500_spec.htm but CTD and GM dealers told me they were not good #'s. I really don't want to put the wrong thing in when I change it out. I went to http://www.standardtransmission.com/ Click "products" on left, click "Dodgew/Cummins Diesel" go to bottom of page. This is $54.00 per gallon "Castrol Syntorq Oil". Is this the stuff?

I have a service manual for my 94 with the same transmission. It's suggests the Syntorq as you mentioned or the Mopar Synthetic Manual Trans. Fluid. The part number for that is 4637579. It's a 94 mind you and would assume the part number would stay the same?
Oh, there is another I could recommend. [img]/forum/images/%%GRAEMLIN_URL%%/laugh.gif[/img]